Automatic power supply control device battery management system and automatic power supply control method of the same

1. An automatic power supply control device of a battery management system (BMS) that automatically controls power supplied from a battery to a load, the device comprising: a converter configured to receive power of a battery to convert the power to power needed for a load, wherein input of the power from the battery to the converter is controlled by a manual control signal (IGON) or by a control signal from a controller (MCU) of the BMS; a manual control signal generator configured to generate the manual control signal (IGON) for controlling driving of the converter; a control signal conversion part configured to, when the manual control signal (IGON) is activated and a predetermined time has elapsed, transmit a signal (NIG), which indicates that the manual control signal (IGON) is activated, to the controller (MCU) and inactivate the manual control signal (IGON); and the controller (MCU) driven by output power of the converter and configured to activate a signal (MWAKEUP) for controlling the driving of the converter and to control power supplied to the load when receiving the signal (NIG) from the control signal conversion part.

2. The device of claim 1 , wherein the control signal conversion part includes: a time delay part configured to distribute an output voltage output from the manual control signal generator and delay the distributed output voltage for the predetermined time; a first switch switched by the output voltage delayed by the time delay part to inactivate the manual control signal (IGON); and a second switch switched by the output voltage delayed by the time delay part to output the signal (NIG).

3. The device of claim 2 , wherein the time delay part includes: a voltage distribution circuit configured to distribute the output voltage output from the manual control signal generator; and a time constant circuit configured to delay output of the voltage distribution circuit for the predetermined time.

4. An automatic power supply control method of a battery management system (BMS) that automatically controls power supplied from a battery to a load, the method comprising: generating, by a user's switching, a manual control signal (IGON); waking, by the manual control signal (IGON), the converter up and generating power needed for a load using power of a battery; generating, by a controller (MCU), which is driven by the power generated by the converter, of the BMS, a signal (MWAKEUP) for controlling driving of the converter; inactivating the signal (IGON) among the signal (IGON) and the signal (MWAKEUP) input to the converter; and controlling, by the controller configured to control the signal (MWAKEUP), the driving of the converter.

5. The method of claim 4 , further comprising: receiving, by the controller, information about a remaining charge amount of the battery from a remaining battery amount sensor configured to detect the remaining charge amount of the battery; and controlling, by the controller, the driving of the converter using the information about the remaining charge amount of the battery.